| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.devtools.build.lib.query2.query; |
| |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.concurrent.ThreadSafety; |
| import com.google.devtools.build.lib.events.Event; |
| import com.google.devtools.build.lib.events.EventHandler; |
| import com.google.devtools.build.lib.packages.NoSuchThingException; |
| import com.google.devtools.build.lib.packages.Target; |
| import com.google.devtools.build.lib.packages.TargetUtils; |
| |
| /** |
| * Record errors, such as missing package/target or rules containing errors, encountered during |
| * visitation. Emit an error message upon encountering missing edges |
| * |
| * <p>The accessor {@link #hasErrors}) may not be called until the concurrent phase is over, i.e. |
| * all external calls to visit() methods have completed. |
| */ |
| @ThreadSafety.ConditionallyThreadSafe // condition: only call hasErrors |
| // once the visitation is complete. |
| class ErrorPrintingTargetEdgeErrorObserver extends TargetEdgeErrorObserver { |
| |
| private final EventHandler eventHandler; |
| |
| /** @param eventHandler eventHandler to route exceptions to as errors. */ |
| public ErrorPrintingTargetEdgeErrorObserver(EventHandler eventHandler) { |
| this.eventHandler = eventHandler; |
| } |
| |
| @ThreadSafety.ThreadSafe |
| @Override |
| public void missingEdge(Target target, Label label, NoSuchThingException e) { |
| eventHandler.handle( |
| Event.error( |
| TargetUtils.getLocationMaybe(target), TargetUtils.formatMissingEdge(target, label, e))); |
| super.missingEdge(target, label, e); |
| } |
| } |